The discipline of Operational and Architectural Management of Database Systems.

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5
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2answers
629 views

When was a Database taken Offline

I am trying to find a way to figure out when was couple of my sql databases were taken offline. I checked the the logs but could not find any such info and moreover there is no default trace enabled. ...
0
votes
3answers
61 views

Prepopulate database with empty / null values [mysql]

What would be the best way to pre-populate a database with 100 empty fields and then begin the Auto_Increment? What I mean to say, I want to reserve the first 100 userfields (ie UIDs which are ...
2
votes
1answer
3k views

Cannot browse for Backup files using SSMS [duplicate]

I'm facing a strange problem. When I try to backup or restore any database using a SQL Server user (not sa) that belongs only to "public" server role, i have the following error when i click the ...
0
votes
1answer
44 views

How to directly query other user tables

I am trying to learn Oracle database and I am having difficulties on importing a backup file with impdp command. I googled deeply but couldn't find answers to my problems. What have I done until now ...
0
votes
2answers
100 views

Is there any other way that we can take auto backup in oracle 11g apart from RMAN?

I have tried with RMAN. But is there any other possible way that we can backup database and tables. backup using queries or stored procedures is possible?
1
vote
0answers
65 views

How does SQL Server know it was abnormally shutdown last time [closed]

I am doing background reading on this. Would like to know how does SQL Server know it was abnormally shutdown last time?
0
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0answers
37 views

Import non-partitioned table into an existing range partitioned table - ORACLE

I have export non-partitioned table1 on disk with some records, then I create same new table2 in my schema (different name) but with range partitioning, I'm talking about Oracle database. So my ...
-4
votes
1answer
27 views

ExecuteNonQuery () not fungsional and database failed [closed]

Public Class Form1 Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load Dim SumberDb As String = "Data Source=c:\users\ogieuntung\documents\visual studio ...
0
votes
0answers
143 views

RapidMiner Not Connecting To SQL Server Database Connection

I recently installed RapidMiner and tried connecting the application to my MS SQL database connection via the Manage Database Connections feature. I have followed video tutorials on integrating SQL ...
1
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0answers
11 views

DB2 Change Journal Receiver Size

We are running DB2 on our iSeries, and there is a journal + journal receiver created. The current size of the journal receiver is 200MB (found using the DSPJRNRCVA command). Is there a way to change ...
0
votes
0answers
47 views

Reducing the size of a PostgreSQL Database, utilizing a process other than full VACUUM

We have a Postgres 8.4 installation which hosts both our Defect tracking and Code management (Surround) systems. We are looking at converting and migrating Surround to MSSQL on another server. Our ...
1
vote
0answers
1k views

How to debug problems with SQL Server multiserver (Master and Target server) administration?

I've tried to set Mater and Target Servers on various cobinations of SQL Servers 2012 R2 on Window Server 2008 R2 and Windows 7 machines but always getting one or 2 of the following errors during ...
0
votes
2answers
45 views

MySQL Image Queries

I have table employees in MySql database with Id, Name, Gender, HireDate, Photo. Photo field is blob. Now when I run this query: SELECT id FROM employees WHERE Photo IS NULL ; it takes forever to ...
1
vote
2answers
55 views

How to Permanently solve MySQL error 2002 (HY000)

I have a problem on my cloud server with 2GB of RAM and 40GB Hard Disk that's hosting a Wordpress website that receives around 1000-2000 hits a day. My problem is that MySQL is always crashing and my ...
0
votes
1answer
30 views

What is different between fixed-size disk pages and disk-based?

As per my knowledge, i understand fixed page size as size of page which used for read and write data but i am not able to understand what does mean of disk based ? I read these words from this paper ...
1
vote
1answer
360 views

Optimizing Amazon RDS - MySQLTuner Recommendations / Feedback & Suggestions

I'm currently trying to optimize a database I've inherited for speed. The server is an Amazon RDS db.m3.large instance: 2 VCPUs 7.5 GB Memory 500 GB HDD My current strategy is to do the ...
2
votes
1answer
387 views

Is there any way MySQL can list relationship cardinality between two entities?

I am working on the project where I have to analyse the MySQL schema. As a part of schema information, I want to list down relationship cardinality between different relations. Does MySQL stores ...
0
votes
3answers
506 views

Should login id and password be stored in separate table

I am working on my academic project. I have a table for employee records which have employee id, joining date, designation and other fields. I am trying to implement a scheme in which when record of ...
1
vote
2answers
72 views

Quickly clone a database in SQL Server Management Studio

For testing purposes, I often have to clone databases (onto the same server). Currently I do this by creating a backup and restoring it as a new database. I would love to have such a functionality ...
1
vote
2answers
88 views

How can I perform this database backup/sanitization task?

I have a 3-node MariaDB/Galera cluster. I need to do two things: Back up the database regularly (multiple gigs in size) for a normal, in-case-everything-crashes-I-can-restore-from-this backup. Have ...
1
vote
2answers
55 views

Is there an easy way to update connection strings to a database moved to a different instance

I have created a new instance of SQL Server 2008 r2 and exported my database to the new instance. Then I realized that the connection string for all of my datasets still point to the original ...
4
votes
1answer
196 views

Sql Server - Running a Job on Multiple servers

I am using SqlServer 2008. I have a Sql Server Job that checks Disk Space and emails admins if the space is less than 15% Instead of adding that Job to all servers is it Possible to run the Job on ...
2
votes
2answers
313 views

MySQL user without SUPER privilege

This may be a simple question and may not be the right place to ask but I couldn't find any useful information from Google. Here is my question. When creating users in mysql using grant all ...
1
vote
1answer
64 views

Incorrect unit allocation size. error comes when Tuning the Database

Here I am Using the SQL IDERA tool for checking the Index and performance of the Database, then i found below error, can any one tell what is it talking about. Incorrect unit allocation size. ...
11
votes
2answers
7k views

Why doesn't DELETE + REORG free diskspace (DB2)?

In DB2 I have a table containing large binary data. Now i purged the whole table and ran runstats, reorg, runstats, but the amount of disk space taken does not change. What could be wrong here? The ...
1
vote
0answers
46 views

Severity 20 Error upon disconnecting Dedicated Administrator Connection

Starting working with Dedicated Administrator Connections on SQL Server 2008 R2 servers. All is working fine (once port 1434 was opened), but am getting severity 20 errors when I disconnect the admin ...
4
votes
2answers
332 views

How to change default database to all logins?

I'm bit new to SQL Server and I'm trying to script out Microsoft SQL Server (2005-2014) post installation activities and I got bit stuck on altering logins. Corporate policy states that none login ...
0
votes
1answer
74 views

What is the best design for storing courses subscription data?

Building an app that will manage lessons, students, courses. Each lesson belongs to a certain course. A student can subscribe to a single lesson or to a whole course. So it seems straightforward that ...
0
votes
2answers
42 views

Initial Discovery process

I am looking to better my knowledge without actually being in the field, I was wondering what initial steps you take when you are assuming the responsibility of a server with SQL-Server installed on ...
1
vote
1answer
58 views

DataBase Back Up - with a Not Null Column [closed]

Can I include a default value to be entered in the Not Null columns when I do database back ups ? If so How can I do that?
0
votes
1answer
368 views

What are the problems with sharing an Access database through online storage service, like Dropbox?

I have a desktop database I created in Access. I'd like to share the database with a single collaborator, who can have full privileges to the database (table access). However, my collaborator is much ...
0
votes
0answers
82 views

MySQL Dynamic columns duplicate value workaround

As the title suggests i have the following code which transposes certain row values into field names, however the problem im having is that the values "closed" & "reopened" may appear in several ...
0
votes
0answers
37 views

Performance/Maintenance Implications of a Write Heavy Table In An Otherwise Normal “CRUD” Database

We have a small-ish (<100,000 rows) MySQL database (on Amazon RDS). Its supporting a fairly simple read heavy CRUD web application. Currently we're building out a web analytics system. It will ...
2
votes
2answers
90 views

How should I (re) index the table while keeping the transaction log small?

I have a 170 GB table in a database. It has 70% fragmentation on its index (index has multiple columns in it). The last time I tried DBCC REINDEX the transaction log blew up in the hundreds of GBs. ...
0
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0answers
16 views

When importing with sqlite3, will the resulting database always be bitwise identical?

If I import a large set of data using the sqlite3 command-line utility on to different computers, will I get bitwise identical databases? For example - if I run a cryptographic hash against them, will ...
0
votes
1answer
109 views

What is the strategy of query evaluation in DBMS when Limit is used in query?

I have following tables in database post(post_id , user_id , post_text , parsed_text) ; Comment(comment_id , post_id , user_id , comment_text) ; friend(id , user_id , friend_id ) ; group (id , ...
1
vote
1answer
512 views

DB2 Commands — Different ways of stopping database

I'm hoping to get a more in-depth explanation of the following DB2 commands, which all relate to stopping the database in some way, and how they differ from each other. How do DBAs think about these ...
0
votes
2answers
1k views

MySQL - HOWTO speed up slave replication on large database / Quickly spawn slave?

We have a large mysql database (about 100GB on disk) that we would like to spawn a slave for. Our typical process for creating a slave is: Create a slave server Load in a mysql dump of the master ...
0
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0answers
54 views

Help with Joins - Cartesian Product

I have 5 regions that each contain 1 store and 1 warehouse. I have a table that contains the regions and corresponding stores and warehouses. I also have a table that lists the inventories of both ...
0
votes
1answer
20 views

Is this normal binary logging behaviour - maintaining one ever growing file despite expire_logs_days?

I have a Percona MySQL DB running on a dedicated server. I have in my.cnf # REPLICATION # log_bin=/var/lib/mysql/binlogs/mysql-bin expire_logs_days=7 My issue is that the log file mysql-bin.000001 ...
1
vote
2answers
537 views

Stored proc getting ANSI_NULLS and ANSI_WARNINGS error when executed by application

I have a stored procedure that is getting the following error when executed via an application : Heterogeneous queries require the ANSI_NULLS and ANSI_WARNINGS options to be set for the ...
0
votes
1answer
94 views

SQL Server 2012 Enterprise: Copy Databases to New SQL Server, Same Domain, Users, Etc

Am having trouble with what seemingly should be an easy process. I'm a SQL Server n00b, so please be gentle and very explanatory with your answers. Currently, I have a SQL Server 2012 cluster ...
1
vote
1answer
133 views

Can we restore backup for standby from external hard drive with differnet drive labels

I am using windows server 2003 and Oracle database 10g R2 and i have taken the backup using RMAN of my primary database in Drive label E. The size of backup is 1.5TB. In my standby database i don't ...
5
votes
1answer
736 views

Why not rebuild indexes with page count <1000?

I use Ola Hallengrens script for Index maintenance. Before I did that, I used the following query to see which indexes are fragmented most: SELECT dbschemas.[name] as 'Schema', dbtables.[name] as ...
3
votes
1answer
678 views

How to remove identity specification for multiple tables

I am having total 109 table in Database and now i am migrating to Amazon server with identity insert and now i want to remove auto increment column specification for all tables. How set auto increment ...
1
vote
3answers
125 views

Linux kernel parameters for oracle

I wonder what are the optimal Linux kernel parameters for oracle 11g db on 64-bit system. I didn't find any detailed, good or full recommendations or best practices for this issue. Just found one ...
0
votes
2answers
582 views

Check if database has changed to determine need to perform backup

I want to check SQL server database is modified or not. Reason to check database is modified is for backup(sql database backup) purpose. So I will be doing a full backup first and if any data ...
1
vote
2answers
4k views

Create database fails with Microsoft SQL Server Error 5133, Operating syste, error 5 (Access is denied) [closed]

I just installed SQL server 2012 on Windows 2012 today. After the install, I changed the database settings to create database files in f:\mssql instead of the default. i verified the confired and ...
3
votes
1answer
125 views

Trace Flag 3688 not working on SQL Server 2014

We are using some third party tools that fill up the SQL Server logs with entries like: SQL Trace ID 1 was started by login "sa". SQL Trace ID 2 was started by login "XX\xxxxx". SQL Trace stopped. ...
2
votes
1answer
356 views

db2 performance issue - large number of IOPS how to determine problem?

DB2 database is on storage. We are using 9.7 Storage administrators reported that today database was doing 5000 IOPS (during past days average number was 300 IOPS). Those are disk operations from ...